apkp777
Well Known Member
My indication.
Full power WOT all my EGT's are even about 1250-1300. #3 cylinder leads the rest by about 50 degrees (hotest). If I bring the throttle back about 1" and 80-85% power the #3 EGT skyrockets to as much as 1500, while the others remain around 1300. If I continue to power back to 70% or so all the EGT's come back together.
My steps so far
Now I know that this is consistent with an intake leak. So I disassembled my intake and cleaned and reinstalled. The tube seal was fine and no evidence of leaking. The intake gasket, also fine and no evidence of leaking. The tube flange also looks fine. I really can't see any evidence of a leaky #3 intake.
Thoughts
My #3 cylinder does have the manifold pressure pick off for both the sender and the P-mags and it also has the primer nozzle (also on #1) I did read someone suggested spraying some ether around the intake while the engine is running. I will do that also. I also realize that this could be a EGT sensor issue.
Question
Is it possible that the MP and or Primer has anything to do with this? My next troubleshooting step will be to disconnect both, but is seems like a real "shot in the dark". Does anyone have any thoughts.
Full power WOT all my EGT's are even about 1250-1300. #3 cylinder leads the rest by about 50 degrees (hotest). If I bring the throttle back about 1" and 80-85% power the #3 EGT skyrockets to as much as 1500, while the others remain around 1300. If I continue to power back to 70% or so all the EGT's come back together.
My steps so far
Now I know that this is consistent with an intake leak. So I disassembled my intake and cleaned and reinstalled. The tube seal was fine and no evidence of leaking. The intake gasket, also fine and no evidence of leaking. The tube flange also looks fine. I really can't see any evidence of a leaky #3 intake.
Thoughts
My #3 cylinder does have the manifold pressure pick off for both the sender and the P-mags and it also has the primer nozzle (also on #1) I did read someone suggested spraying some ether around the intake while the engine is running. I will do that also. I also realize that this could be a EGT sensor issue.
Question
Is it possible that the MP and or Primer has anything to do with this? My next troubleshooting step will be to disconnect both, but is seems like a real "shot in the dark". Does anyone have any thoughts.
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